By back in the day I mostly mean middle ages.
My question can be broken into things like, would the average boy want a sword as a gift aside from wanting to protect himself? Did children had makeshift sword toys out of wood or whatnot for the sake of entertainment and not training? Would it be absurd for a farmer to save up money and buy a sword not for self-defense but just because he thinks it's cool?
While you wait, check this answers from /u/BlueStraggler
https://www.reddit.com/r/AskHistorians/comments/56uh7w/why_did_the_sword_become_the_weapon_par/
https://www.reddit.com/r/AskHistorians/comments/p86bi3/swords_are_romanticized_as_the_most_common/
Also this one from /u/alriclofgar